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Ascorbic acid increases the thrombogenicity of cellular matrices.

G A Hindriks1, J J Sixma, P G de Groot

  • 1Department of Haematology, University Hospital Utrecht, The Netherlands.

Thrombosis and Haemostasis
|October 1, 1991
PubMed
Summary
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Ascorbate significantly alters extracellular matrices in smooth muscle cells and fibroblasts, impacting platelet interactions. This research highlights ascorbate

Area of Science:

  • Biochemistry
  • Cell Biology
  • Biomaterials

Background:

  • The extracellular matrix (ECM) is crucial for cellular function and tissue integrity.
  • Platelet interactions with the ECM are vital in hemostasis and thrombosis.
  • Ascorbate (Vitamin C) is a known cofactor in collagen synthesis.

Purpose of the Study:

  • To investigate ascorbate's influence on ECM composition in human endothelial cells, smooth muscle cells, and fibroblasts.
  • To assess how ascorbate-modified ECMs affect platelet adhesion and aggregation.

Main Methods:

  • Culturing human endothelial cells, smooth muscle cells, and fibroblasts with and without ascorbate.
  • Analyzing ECM composition, focusing on proline incorporation and collagen types.
  • Perfusing whole blood over isolated ECMs to measure platelet adhesion and aggregate formation under varying shear rates.

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Main Results:

  • Ascorbate did not affect ECM proline incorporation or platelet interactions in endothelial cells.
  • Ascorbate significantly increased collagen types I and III in smooth muscle cell ECMs, leading to enhanced platelet aggregation.
  • Ascorbate increased platelet adhesion to fibroblast ECMs at lower shear rates, despite no significant change in proline incorporation.

Conclusions:

  • Ascorbate significantly modifies the endogenous ECMs of smooth muscle cells and fibroblasts.
  • Changes in ECM composition induced by ascorbate profoundly affect platelet interactions.
  • These findings suggest potential implications for cardiovascular health and wound healing.